Facet

Name: Facet
Author: chndr-prksh

by chndr-prkshversion 0.1.0i★ –iRuns on your computer

Registry nameio.github.chndr-prksh/facet

Install

Overview

Description from the maker (original English)

Check web pages for responsive design problems and screenshot them on phone, tablet and desktop.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Design, images & audio

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "facet": {
      "command": "npx",
      "args": [
        "-y",
        "@chandra14/facet-check",
        "mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add facet -- npx -y @chandra14/facet-check mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "facet": {
      "command": "npx",
      "args": [
        "-y",
        "@chandra14/facet-check",
        "mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "facet": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@chandra14/facet-check",
        "mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account chndr-prksh, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Design, images & audioi

More stars than 0% of the other 2204 servers in this category
Published to the registry more recently than 56% of the other 2204 servers in this category
Basic checks equal to or better than 100% of the other 2204 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Facet safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 24 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Figma Context MCP, Claude Real Video, Figma MCP Server

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Figma Context MCP

by GLips

Give your coding agent access to your Figma data. Implement designs in any framework in one-shot.

Runs on your computer★ 16,165MITUpdated 5 months ago

Install

Claude Real Video

by HUANGCHIHHUNGLeo

Let any LLM watch a video locally — and search everything it has ever watched.

Runs on your computer★ 2,284MITUpdated 2 months ago

Install

Figma MCP Server

by figma

Figma’s official server gives AI your design data so it can turn designs into code or describe them accurately. Connects to Figma’s cloud.

Runs in the cloud★ 2,152Updated 13 months ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

facet-check

Check a web page for responsive design problems on real phone, tablet and desktop viewports. It runs from the command line, in CI, or as an MCP server that AI coding agents (Claude Code, Cursor, Codex, VS Code) can call.

npx @chandra14/facet-check localhost:3000

Or install it once with npm install -g @chandra14/facet-check, then run facet-check localhost:3000.

Output for a test page with a price table that is too wide for phones (shortened):

Facet check http://localhost:3000

6 devices · 14 errors · 14 warnings

✗ iPhone 16 393×852 @3x error Page scrolls sideways by 267px — The document is 660px wide in a 393px viewport. error Extends 267px past the viewport — “SizeWhole beanGroundSubscriptionWholesal” html > body > main > table fix: Constrain it with max-width: 100%, min-width: 0 on a flex child, overflow-wrap: anywhere, or let it scroll inside its own container. error Tap target is 13 × 13px — #weekly fix: Targets must be at least 24 × 24px (WCAG 2.5.8); 44 × 44px is comfortable. warn Field text is 14px, so iOS zooms in on focus — #email fix: Give form controls font-size: 16px or larger. console Carousel failed to initialise at 393px

! Full HD laptop at 125% (most common) 1536×864 @1.25x warn Text is only 10px — “Prices include tax. Orders placed after ”

Each device is a real emulation in headless Chromium, not a resized window. It uses the device's viewport, pixel ratio, touch support, mobile viewport behaviour and user agent. A page with no viewport meta tag lays out at 980px on a phone, as it would on the real device.

It is the command-line and agent side of Facet, an open-source browser for responsive web development. Facet's device catalogue has 290+ profiles, from the iPhone SE to 2026 flagships, foldables, tablets, laptops and 4K monitors.

What it finds

On every device:

Horizontal scrolling, and the element that causes it (the table, not each of its cells)
Tap targets smaller than 24 × 24px on touch devices (WCAG 2.5.8)
Text smaller than 12px, and text that is cut off without an ellipsis
Form fields under 16px, which make iOS zoom in when focused
Viewport meta problems: missing, not device-width, or zoom disabled
Images that are far larger than needed, blurry on high-density screens, or missing dimensions
Fixed headers and banners that cover too much of a small screen
Console errors, uncaught exceptions and failed requests, per device. An error that only one device logs is a viewport-specific bug.

Command line

npx @chandra14/facet-check <url> [options]

Option
`-d, --devices`	Device ids, names, sizes like `1024x768`, or a preset (default: `popular`)
`-s, --screenshots`	Save a PNG of each device
`--full-page`	Capture the whole page, not only the first screen
`--json`	Print the full report as JSON
`--all`	Also list info-level notes
`--fail-on`	Exit 1 when a finding is at least `error` (default), `warn` or `info`; `never` always exits 0
`--timeout`	Page load timeout (default 30000)
`--list-devices [query]`	Show presets and the device catalogue

The URL can be a full URL, a bare host (example.com), a local dev server (localhost:3000, :5173) or a path to an HTML file.

Presets: popular (the six most common real-world sizes), default (phone, tablet, laptop), phones, latest, tablets, desktops, apple, foldables, extremes.

npx @chandra14/facet-check localhost:3000 -d phones --screenshots shots

npx @chandra14/facet-check https://example.com -d iphone-17,"Galaxy S26",ipad,1440x900 --json

In CI

The exit code is 1 when errors are found, so it can gate a pull request:

- run: npx @chandra14/facet-check http://localhost:4173 --fail-on error

MCP server for AI agents

facet-check mcp runs a Model Context Protocol server over stdio. An agent can then check its own CSS changes on many screen sizes and look at the result.

Claude Code

claude mcp add facet -- npx -y @chandra14/facet-check mcp

Cursor, VS Code, Claude Desktop and other clients

"mcpServers": { "facet": { "command": "npx", "args": ["-y", "@chandra14/facet-check", "mcp"] } } }

Tool	What it does
`check_responsive`	Loads a URL on several devices and returns the problems on each, with selectors and fixes
`screenshot`	Returns one labelled image per device (viewport or full page)
`compare_element`	Measures one element on every device: size, visibility, font size, display, flex and grid
`audit_accessibility`	Runs axe-core on one device and returns WCAG violations with fixes
`list_devices`	Lists the device catalogue and presets

Then ask, for example: *"Check localhost:3000 on phones and fix anything that scrolls sideways."*

Requirements

Node 20 or later and a Chromium-based browser. facet-check uses, in order: the browser at FACET_CHROME, Playwright's Chromium (npx playwright install chromium), Google Chrome, then Microsoft Edge. Most machines already have one of these.

Limits

Chromium only. An iPhone profile emulates the iPhone's screen, not Safari's WebKit engine. Safari-specific bugs still need Safari.
It checks the page as it is after load. Content behind a login or a click is out of reach from the command line.

License

MIT

Facet

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Design, images & audioi

Common questions

Alternatives

Figma Context MCP

Claude Real Video

Figma MCP Server

README from the maker

facet-check

What it finds

Command line

In CI

MCP server for AI agents

Requirements

Limits

License